<template>
  <!-- 输入框 -->
    <header class="header">
      <h1>小黑记事本</h1>
      <input @keyup.enter='todoAdd' v-model="todoName" placeholder="请输入任务" class="new-todo" />
      <button class="add" @click='todoAdd'>添加任务</button>
    </header>
</template>

<script>
export default {
  data(){
    return {
      todoName:''
    }
  },
  methods:{
    todoAdd(){
      // console.log(this.todoName);
      if(this.todoName.trim()===''){
        alert('请输入任务清单')
        return
      }
      this.$emit('add',this.todoName)
      this.todoName=''
    }
  }

}
</script>

<style>

</style>